番茄红素的提取工艺研究

鲜番茄制成糊,用Na2CO3溶液皂化,再用稀硫酸中和起泡,过滤。滤饼用乙醇处理过滤后用有机溶剂提取番茄红素。考察了皂化剂用量、皂化时间、乙醇用量、提取剂种类及其用量、料液比、浸提时间、浸提温度、pH值等因素对提取率的影响。结果显示,新鲜番茄中提取番茄红色素的最佳工艺条件为:用0.5 mol/L的Na2CO3溶液对番茄糊进行皂化,物料比为1∶2,皂化温度40℃,皂化时间30 m in;乙醇∶番茄(体积∶质量)为2∶1,处理时间10 m in;用乙酸乙酯和丙酮的混合液进行提取,乙酸乙酯∶丙酮为1∶2(体积比),物料比为1∶4,浸提温度45℃,浸提时间50 m in,pH=7。在此最佳条件下,番茄红素的相对提取率可达85.9%。     

番茄红素提取及优化研究

从番茄中提取番茄红素,研究了在不同的提取温度、时间、料液比、pH值等因素下的提取效果,并用正交实验确定了最佳的工艺条件.     

番茄红素提取工艺的初步研究

番茄红素是一种具有抗癌活性的类胡萝卜素。本实验是番茄中提取番茄红素，研究了在不同的提取温度，时间，料液比，浸取液等因素下的提取效果，确定了最佳的浸取工艺条件。为进一步开发这种功能性天然色 素奠定了基础。     

丙酮提取姜黄中姜黄素的工艺研究

用丙酮提取姜黄中的姜黄素,考察了丙酮浓度、固液比、提取次数、提取时间对姜黄素产率的影响。结果表明,丙酮提取姜黄素的最佳工艺条件为:加20倍量70%丙酮,提取2次,每次提取2 h,在此条件下姜黄素含量达到5.17%(HPLC法)。     

番茄红素提取方法的研究

研究了从番茄中提取番茄红素的方法 ,考察了提取温度、时间、料液比、浸取液等影响因素 ,确定了最佳的浸取工艺条件。使用 6# 溶剂油二级浸提番茄糊 ,在番茄糊质量与溶剂体积比为 0 33g/ml、浸提时间 2～ 3h、pH值 6、浸提温度 35℃及加入助剂条件下 ,能充分提取色素 ;若使用微波辐射法 ,在微波功率 2 0 0W、萃取时间 80s,番茄糊质量与溶剂体积比为 0 5g/ml条件下 ,能得到最好效果     

番茄红素提取的研究进展

番茄红素是颜色鲜艳的天然红色素,因其具有极强的抗氧化活性而备受关注。综述了番茄红素的提取技术研究进展,并展望了番茄红素提取技术未来的发展前景。     

超声波法提取番茄红素的研究

对超声波法提取番茄红素的工艺进行了选择优化。考察了提取剂种类、超声提取时间、料液比、超声波功率、提取级数、pH对番茄红素提取率的影响。结果表明,超声提取番茄红素的最佳工艺为：以乙酸乙酯为提取剂,料液比为1∶4（g/mL）,pH为7.0,超声提取功率200 W,提取25 min,提取级数二级。在此条件下,番茄红素提取率可达0.605 mg/g。     

微波法提取番茄红素的研究

研究了微波法对番茄红素提取效果的影响。确定番茄红素的最优提取条件为：微波功率420 W,处理时间为25 s,固液比为1∶2（g∶mL）,提取次数为3次。     

南瓜中番茄红素的提取方法研究

采用有机溶剂浸提法对南瓜中番茄红素的提取进行研究。结果表明,提取溶剂为石油醚、丙酮、乙醇（体积比3：2：1）作为提取剂提取效果最佳,提取的最佳条件为提取剂与物料比2：1（v／g）,提取时间50min,提取温度35℃。     

微波法提取番茄红素的研究

以番茄为原料,采用微波法提取番茄红素,考察了提取溶剂、微波功率、微波时间、料液比、pH、提取级数对番茄红素提取率的影响,利用正交实验和单因素实验确定番茄红素微波提取的最佳工艺:以乙酸乙酯为提取剂,提取功率400 W,提取30 s,料液比1:2,pH为7.0,提取3次。在此条件下,番茄红素提取率可达0.593 mg/g。     

Cottonseed extraction with mixtures of acetone and hexane

Cottonseed flakes were extracted with mixtures of n-hexane and acetone, with the concentration of acetone varying between 10 and 75%. Adding small amounts of acetone (≤25%) to n-hexane significantly increased the extraction of free and total gossypol from cottonseed flakes. Sensory testing detected no difference in the odor of cottonseed meals produced either by extraction with 100% n-hexane or by extraction with a 10∶90 (vol/vol) mixture of acetone/hexane. More than 80% of the free gossypol was removed by the 10∶90 mixture of acetone/hexane, whereas pure n-hexane extracted about 47% of the free gossypol from cottonseed flakes. A solvent mixture containing 25% acetone removed nearly 90% of the free gossypol that was removable by extraction with pure acetone; the residual meal had only a minimal increase in odor. In contrast, cottonseed meals produced by extraction with pure acetone had a much higher odor intensity. The composition of the cottonseed crude oil was insignificantly affected by the acetone concentration of the extraction solvent. The results indicate that mixtures of acetone and n-hexane can be used as extraction solvents to produce cottonseed crude oil without the concomitant development of odorous meals.     

醇/小分子有机物-无机盐二元双水相体系分离萃取甲基橙

基于小分子醇双水相体系和小分子有机物双水相体系,建立了正丙醇/丙酮-硫酸铵形成的二元双水相体系萃取甲基橙的新方法,研究了分相盐、醇及小分子有机物的类型、用量及比例、温度、溶液酸度、甲基橙浓度对甲基橙分配行为的影响。结果表明,硫酸铵浓度为30%,正丙醇∶丙酮=2∶1,溶液酸度在pH=5.5～6范围,温度为25℃,二元双水相体系对甲基橙有较高萃取率,可达89.57%和分配系数达到48.66。     

Lipid composition in tomato skin supercritical fluid extracts with high lycopene content

The use of supercritical fluid extraction is proposed for obtaining stable extracts with high added value from natural and economical sources. Lipid composition, namely, of FFA, TAG, and FAME, in tomato skin extracts with high lycopene content was determined. Separation of different classes of lipids was achieved from tomato extracts using TLC followed by transesterification and GC, and lycopene and other carotenoids were analyzed by HPLC with a photodiode array detector. In lycopene extracts obtained using supercritical fluids, no FFA were found and polyunsatureted TAG represented only 9.2% of the total TAG content.     

动力波清洗法处理空气中的丙酮

自组装了动力波实验装置,对装置的复合性能、气速与压降、驻区与气液比等关系进行测定,确定了装置正常操作的条件,气速在2 264.8⁴ 917 L/h范围内,液气比在0.015 54 917 L/h范围内,液气比在0.015 5⁰.027 4之间,驻区稳定。以空气通过丙酮溶液模拟车间含丙酮空气,对装置的吸收效率进行测定。结果表明,以清水为吸收液时,低浓度丙酮吸收效率接近100%;以含丙酮水循环操作时,随溶液中丙酮浓度增高,吸收效率降低;吸收液中添加丙酮稳定剂时,随稳定剂浓度增加效果会下降,稳定剂浓度为处理液的1.36/10 000时,吸收率比清水提高12%,总效率可达86.2%。     

微波法提取番茄红素的研究

以番茄为原料,采用微波法提取番茄红素,考察了提取溶剂、微波功率、微波时间、料液比、pH、提取级数对番茄红素提取率的影响,利用正交实验和单因素实验确定番茄红素微波提取的最佳工艺:以乙酸乙酯为提取剂,提取功率400 W,提取30 s,料液比1:2,pH为7.0,提取3次。在此条件下,番茄红素提取率可达0.593 mg/g。